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Class Information
Number: 208/417
Name: Mineral oils: processes and products > By treatment of solid mineral, e.g., coal liquefaction, etc. > Including contact of feed with liquid produced in the process, i.e., recycle > Recycle of bottoms (resid)
Description: Subject matter in which a distillation is performed upon an intermediate mixture in the process, and the nonvaporized portion from the distillation operation is recycled.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 6936159 |
Process for recovering hydrocarbons from a carbon containing material |
Aug. 30, 2005 |
| 6511937 |
Combination slurry hydroconversion plus solvent deasphalting process for heavy oil upgrading wherein slurry catalyst is derived from solvent deasphalted rock |
Jan. 28, 2003 |
| 5783065 |
Method for coal liquefaction |
Jul. 21, 1998 |
| 5308477 |
Method for coal liquefaction |
May. 3, 1994 |
| 5122260 |
Liquefaction of solid carbonaceous material with catalyst recycle |
Jun. 16, 1992 |
| 5120429 |
Co-processing of carbonaceous solids and petroleum oil |
Jun. 9, 1992 |
| 5096569 |
Catalytic hydropyrolysis of carbonaceous material with char recycle |
Mar. 17, 1992 |
| 5071540 |
Coal hydroconversion process comprising solvent extraction and combined hydroconversion and upgrading |
Dec. 10, 1991 |
| 5045180 |
Catalytic two-stage coal liquefaction process having improved nitrogen removal |
Sep. 3, 1991 |
| 4994174 |
Process and system for low-temperature carbonization of oil shale, oil sands or similar oil-bearing solids |
Feb. 19, 1991 |
| 4874506 |
Catalytic two-stage coal hydrogenation process using extinction recycle of heavy liquid fraction |
Oct. 17, 1989 |
| 4818374 |
Process for converting coal to an oil fraction |
Apr. 4, 1989 |
| 4741822 |
Procedure for hydrogenation of coal by means of liquid phase and fixed-bed catalyst hydrogenation |
May. 3, 1988 |
| 4740289 |
Process for the hydrogenolysis of a coal liquid bottom |
Apr. 26, 1988 |
| 4675102 |
Process for producing a diesel fuel from medium heavy oil obtained from coal |
Jun. 23, 1987 |
| 4627913 |
Catalytic coal liquefaction with treated solvent and SRC recycle |
Dec. 9, 1986 |
| 4610777 |
Coal liquefaction with Mn nodules |
Sep. 9, 1986 |
| 4609455 |
Coal liquefaction with preasphaltene recycle |
Sep. 2, 1986 |
| 4605486 |
Coal liquefaction process with increased naphtha yields |
Aug. 12, 1986 |
| 4602992 |
Coal hydrogenation process with integrated refining stage |
Jul. 29, 1986 |
| 4601812 |
Oil shale retorting process |
Jul. 22, 1986 |
| 4596650 |
Liquefaction of sub-bituminous coal |
Jun. 24, 1986 |
| 4595488 |
Multistage process for the direct liquefaction of coal |
Jun. 17, 1986 |
| 4589973 |
Process for recovering oil from raw oil shale using added pulverized coal |
May. 20, 1986 |
| 4587006 |
Process for recovering shale oil from raw oil shale |
May. 6, 1986 |
| 4569749 |
Coal liquefaction process |
Feb. 11, 1986 |
| 4565622 |
Method of liquefying brown coal |
Jan. 21, 1986 |
| 4539098 |
Upgrading carbonaceous materials |
Sep. 3, 1985 |
| 4537675 |
Upgraded solvents in coal liquefaction processes |
Aug. 27, 1985 |
| 4536277 |
Shale oil stabilization with a hydrogen donor quench and a hydrogen transfer catalyst |
Aug. 20, 1985 |
| 4522700 |
Coal liquefaction |
Jun. 11, 1985 |
| 4521292 |
Process for improving quality of pyrolysis oil from oil shales and tar sands |
Jun. 4, 1985 |
| 4510040 |
Coal liquefaction process |
Apr. 9, 1985 |
| 4494960 |
Process for the production of pumpable coal slurries |
Jan. 22, 1985 |
| 4491511 |
Two-stage coal liquefaction process |
Jan. 1, 1985 |
| 4485008 |
Liquefaction process |
Nov. 27, 1984 |
| 4485003 |
Supercritical extraction and simultaneous catalytic hydrogenation of coal |
Nov. 27, 1984 |
| 4473460 |
Continuous preparation of hydrocarbon oils from coal by hydrogenation under pressure in two stages |
Sep. 25, 1984 |
| 4461694 |
Coal liquefaction process with enhanced process solvent |
Jul. 24, 1984 |
| 4434043 |
Recovery of catalyst from coal liquefaction residues |
Feb. 28, 1984 |
| 4424110 |
Hydroconversion process |
Jan. 3, 1984 |
| 4412908 |
Process for thermal hydrocracking of coal |
Nov. 1, 1983 |
| 4400263 |
H-Coal process and plant design |
Aug. 23, 1983 |
| 4397732 |
Process for coal liquefaction employing selective coal feed |
Aug. 9, 1983 |
| 4377464 |
Coal liquefaction process |
Mar. 22, 1983 |
| 4374015 |
Process for the liquefaction of coal |
Feb. 15, 1983 |
| 4372838 |
Coal liquefaction process |
Feb. 8, 1983 |
| 4369106 |
Coal liquefaction process |
Jan. 18, 1983 |
| 4364817 |
Method for controlling boiling point distribution of coal liquefaction oil product |
Dec. 21, 1982 |
| 4364818 |
Control of pyrite addition in coal liquefaction process |
Dec. 21, 1982 |
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